6.6: Geological Activity and Earthquakes- Challenge 1

1. ___ is the type of stress that occurs at a transform boundary, which causes earthquakes.

Shearing

2. Why don't rocks deform under confining stress?

Space is too limited

3. Compressional stress ___.

decreases the space a rock takes up

4. Sedimentary rocks contain important information about ___.

the geological history of an area

5. As a rule, ___ rocks form in horizontal layers.

sedimentary

6. A ___ is a three-dimensional syncline.

basin

7. ___, which bend downward and have the youngest rocks in the center, and ___, which bend upward and have the oldest rocks in the center, are often found adjacent to each other.

Synclines; anticlines

8. The Michigan Basin is made by rock bent ___.

downward

9. A fracture with no movement on either side is a ___.

joint

10. The hanging wall drops down relative to the footwall in a ___.

normal fault

11. The Andes Mountains grow as the ___ subducts beneath the South American Plate.

Nazca Plate

12. ___ is a continental volcanic arc.

The Cascades

13. Mountain formation is associated with ___.

faulting, folding, and plate tectonics